SAT Subject Biology Practice Question 126: Answer and Explanation
16. Medical researchers tested two different medications for treating type I diabetes. Both Drug 1 and Drug 2 mimic the effects of insulin on muscle, brain, and liver cells. The graph depicts the serum (blood) levels of the drugs in patients through eight hours after injection.
A patient with type I diabetes eats a large meal and then takes a dose of Drug 2. If the drug is effective, what changes will occur in the patient?
I. The amount of glucose in the blood will increase.
II. The amount of glucose in muscle cells will increase.
III. The amount of glucose stored in the liver will decrease.
A. I only
B. II only
C. III only
D. I and II
E. II and III
Correct Answer: B
If the drug effectively mimics insulin, it will decrease the patient's blood glucose, which becomes elevated after a meal. Insulin works by allowing glucose in the blood to enter muscle and other cells, increasing the amount of glucose in these cells.